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1988. U.S. Geological Survey. This map layer contains mortality information for United States Health Service Areas (805 groups of counties). Included are mortality rates by sex... U.S. Geological Survey.

1974. U.S. Geological Survey. This data set contains 1970-1994 cancer mortality information for counties in the United States. Included are death rates, number of deaths, confi... U.S. Geological Survey.